... Is it normal for the car to spin the wheels in the air when in neutral?

Yes. The trans oil is making a 'viscous coupling' between the shafts inside the transmission. As one shaft spins it slings oil around onto the other one and causes a fluid connection (which, BTW, is how a torque converter works. Since there is no mechanical connection, you can stop the tire from spinning with your foot (and, it wouldn't spin with the tires on the ground). Thinner oil or a lower oil level in the transmission would keep this from happening but it isn't indicative of a problem or defect.

BTW: The suggestion of a sticky pilot bearing doesn't fit in this instance since your foot is off the clutch pedal when this is happening (the clutch disc is clamped between the pressure plate and the flywheel so the input shaft is spinning at the same RPM's as the crankshaft).

Today I got a gas tank, front bumper, rear bumper trim, heater unit thingy, etc. I got the whole heater unit but really only needed the thermostat. Put in said thermostat so now the electric side of the AC is fixed. Also propped the recirc shutter so now it's stuck off instead of on. And I installed a 740 efan to get rid of that wooshy shroudless mechanical one. I think next on the list is to fix whatever leaks the AC has and put on a real exhaust. Also bumpers.

It's been down on power lately. Yesterday it would only do 9psi, today it barely went over 5. Feels totally normal otherwise. Will boost leak test in a bit. Also when I pop the hood after running it I can see a bit of smoke coming off the turbo.

No I just pulled the hose off the compressor housing and capped it. I think I've narrowed the leak down to the IAC or something else on the intake manifold. It does build boost, but it takes forever and there isn't much of it.

Lol, yeah. I have the LH 2.2 EZK box and engine harness but I'm missing the harness that connects the EZK. Seller forgot to include it with all the stuff I bought from him and seems to have disappeared.. (On Volvoforums.)

Okay, so I've done a lot to it over the last few weeks. Big thing being a brand new Barton harness and EZK box plus a sbabbs fuel chip. Right now I'm running about 13PSI. I am having a couple issues, the temp gauge being intermittent and the AC randomly shorting out. Also earlier today I blew out an exhaust manifold gasket so now it's all ticky. Good news is that I already have a 90+ on its way and gaskets in my toolbox. Also threw on a new BOV since the last eBay one and the old CBV both leak. Sometime I'll get around to taking it off.

So I've been running the 90+ for awhile now. I didn't bother to port it but the turbo is definitely more responsive, though that could be due to the fact that before it was leaking from every cylinder at least a little. The front half of the manifold bolts were finger tight and the back half needed a breaker bar.

Other than that I've just been driving it. I think I've successfully wiggled the AC wire enough that now it won't short out. The lack of temp gauge still feels sketchy to me though. And I lost the clip to the ECU temp sender so every once in awhile it pops off and becomes really hard to start. Other than that, just peachy. Running 14PSI and I feel like it's starting to run out of fuel, although I don't have a wideband yet so I can't be sure. Currently running brown? tops with stock MAF. I have a 3 inch MAF that I just need piping for. But yeah, it's pretty fast as is. Lime Rock park Eeuro thing is soon, so gotta get ready for that.

Oh, also the gas tank started leaking at ~3/4 instead of near the top like it used to. Gotta get around to putting the new one in sometime. It'll be cool to finally have a car that I can fill the tank all the way in.

And the suspension could probably use new bushings all around, but cornering is for losers so whatever.